The action of zinc on hydrochloric acid yielded 4.48 liters of hydrogen. what mass of zinc has reacted?

Zinc reacts with hydrochloric acid to release hydrogen gas and form zinc chloride:

Zn + 2HCl = ZnCl2 + H2;

1 mole of zinc reacts with 2 moles of acid. In this case, 1 mol of salt is formed and 1 mol of hydrogen gas is released.

Let’s calculate the released amount of hydrogen. To do this, we divide the volume of synthesized hydrogen by the volume of 1 mole of gas, which is 22.4 liters.

V H2 = 4.48 liters; N H2 = 4.48 / 22.4 = 0.2 mol;

To synthesize such an amount of hydrogen, it is necessary to take the same amount of zinc. Let’s calculate its weight by multiplying the amount of substance by the weight of 1 mole of metal:

M Zn = 65 grams / mol; m Zn = 0.2 x 65 = 13.0 grams;